Abstract:
:Repetitive nerve stimulation (RNS) of the median nerve is rarely studied in myasthenia gravis (MG). We performed a retrospective analysis of RNS studies performed on 448 patients at our center between 2010 and 2016. Among 95 patients with MG, an abnormal decrement of the compound muscle action potential amplitude was seen in 40.7% of median, 38.4% of spinal accessory, and 57.1% of facial nerve RNS studies. Median nerve RNS was abnormal in 10 patients with normal spinal accessory and 5 patients with normal facial nerve RNS. MG patients with abnormal median nerve RNS were more likely to be seropositive and have limb weakness. No differences were observed in the incidence of abnormal median nerve RNS in patients with and without a median neuropathy at the wrist. Median nerve RNS is easy to perform, reproducible, and should be considered in the electrodiagnostic evaluation of MG.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Lee TH,Li Ydoi
10.1002/mus.26713subject
Has Abstractpub_date
2019-12-01 00:00:00pages
658-661issue
6eissn
0148-639Xissn
1097-4598journal_volume
60pub_type
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